I am trying to send and receive serial commands over bluetooth. I have installed pyBluez library. The issue is that while the rfcomm.conf exists there is no rfcomm0 in /dev/ directory. I rebooted but ...

I have two text files in which I have to use the comm command to extract all unique words from file 1. So just those that are not in file 2.
I was asked to use the comm command (not diff nor join).
I ...